煤热溶技术及热溶物在配煤炼焦过程中的应用

煤热溶是近年发展起来的一种高效洁净煤技术。煤的热溶物因具有灰含量极低、热值高、热塑性好等特性，受到越来越多的关注。本文首先简述了煤热溶过程和热溶物的制备方式，指出不同制备方式优缺点的同时，介绍了热溶工艺在工业化方面的最新进展；然后详细分析了煤种特性、热溶溶剂、热溶温度等因素对热溶物收率及品质的影响，认为应遵循“因煤而异”的原则对热溶过程进行调控。基于热溶物良好的热塑性，着重介绍了热溶物在配煤炼焦过程中的应用。在配煤中添加一定比例热溶物可显著改善焦炭冷热态性能，提高焦炭质量；此外，热溶物在配高硫煤炼焦过程中对硫分的定向调控作用也应予以关注，这对节约优质炼焦煤资源具有重要的意义。而降低生产成本、提高热溶收率是解决热溶物工业化制备及应用的关键。

Thermal dissolution technology of coal and application of soluble portions in coal blending for coke-making

Thermal dissolution of coal is a highly efficient conversion and utilization technology of coal developed in recent years. The soluble portions with low ash content, high heat value and better thermoplasticity, have received more and more concerns. This paper firstly introduced the process of thermal dissolution and the preparation methods, and some advantages and disadvantages of preparation methods were pointed out. Meanwhile, the latest progress in industrialization was described. The factors including coal properties, solvent, temperature and so on, were emphatically discussed, which were of great influence on the yield and quality of soluble portions. The author pointed that thermal dissolution process should be regulated according to properties vary from coal to coal. In addition, the application of soluble portions in coal blending for coke-making based on its excellent thermoplasticity was mainly introduced. A certain proportion of soluble portions blended for coke-making could significantly improve the quality of coke. In addition, the effect of soluble portions on sulfur directional regulation during blending coking with high sulfur coal should be paid attention, which was important for saving of high-quality coking coal resources. At last, it concluded that reducing production cost and improving yield were the key to realize the industrial production and application of soluble portions.